'Some' plus the noncount form works with many food items. When we are no longer dealing with the individual plants or animals, we can consider the foodstuff an uncountable-- often (but not necessarily) because it is mashed, chopped or otherwise de-individualized:
I fed the baby some banana/hamburger (a quantity of that substance)
I fed the baby half a banana / a hamburger (a segment of one of the fruit/sandwich)